Shttttek lock fob



Feb. 20, 1923. 1,446,186

J. G. KALANZIS SHUTTER LOCK FOR CAMERAS Filed Sept. 23, 1921 2 sheets-sheet l ATTOP/VZKS.

Feb. 20, 1923. 1,446,186

J. G. KALANZIS SHUTTER LOCK FOR CAMERAS Patented Feb. 26. 1923 JAMES G. KALANZIS, OF CHATTANOOGA, TENNESSEE.

SHUTTER LOCK FOR CAMERAS.

Application filed September 23, 1921. Serial No. 502,809.

To all whom it may concern:

Be it known that 1, JAMES G. KALANZIS, a subject of the King of Greece, who has filed his first papers for citizenship in the United'States, and a resident of Chattanooga, in the county of Hamilton and State of Tennessee, haveinvented certain new and useful Improvements in Shutter Locks for (lameraa of which the following is a full, clear, and exact description, reference be ng had to the accompanying drawings, forming part of this specification. 1 My invention relates to mechanism for attachment to the shutte'r'mechanism of camerasin which'an indicator-is-employed to indicate when a picture has been taken and alo'ck is broughtinto operation to prevent the subsequent operation of the shutter and a double'exposure of the sensitized film or "ThobjeCt 'of the invention is,-an1ong other things, to provide a'siinple a-nd 'efl'eo ,iivd diistruction whichcan be applied to the sliutter *mechanis n -of the ordinary *c'cmemfwuh 'a minimum number of openings into the shutter-housing whereby the en- "trance-6f rays; ofilight' he hindthe shutter is 'iiv"dided 2ind to insurelefi'ective operation of 20 plate until thefilin shifting device is 10pas urance-"oi "the piempt and nnfailingTe- My"inventionhas'special relation to imtters Patent N o.-' -1 ,2'62,'657, of April 16, f1'9183to .TI WQ'Ford, anditjernbodies that aeeieaih novel-construction and arrangement e'd out and claimed.

' I hav'e illustrated my invention in connecti'on with a folding, sensitized roll film came'ra, bntit' will ,be'obvious that the invention "cain he 'appli edto any, ordinary'camera constrdction whether, filrnor plate, and in describing the'parti'cular details of well known camera parts do notwish to he understood asconfining myself tosuch details, and many soiobviouschanges can be made in the appl1cation of the improvements to the particular camera selectedflithout departing from the "spirit of my invention. In the"drawin 's, Figure'lisa 'r ont elevation of a portion of a folding camera showing my improve- 'I have made" no effort to ill tails 'offthe camera construction, as they are "all well known and any other construction than thei oneindicatedcould have been selected.*'

30 l Ie'fiindicttniand locketall't'i'rnes with the ments, with the shutter mechanism unlocked and ready for operation.

Figure 2 is a top plan view of same with the shutter mechanism locked.

Figure 3 is a front elevation of the improvement applied to the shutter mechanism with the same'locked from operation.

Figure 4 is a detail top plan view of parts f the lock and releasing; devices.

Figure 5 is a sectional side elevation of the same.

Figure 6 is a perspective view of the tensioning device for the flexible shaft.

The camera casing is indicated at.'1 with a, bellows 2 connecting the film' compartment With the lens and shutter'devices.

The exposed sensitized "film is wound in a reelB turned by finger piece 4. The's'hu'tt'er housingi's indicated at, 5 containing a lever 6 actuated b 'a shutter lever 7 v'vhichin turn is operated y a firi er'piece -72 or by a'pneumatic plunger and fie'xible tube 8 1n the ordinary way to release the'shutter and expose the film or plate.

a -p l m'y 'invention l provide as i n to slide verticailythrough a slot'in 'the top of the-casefa "lateiQ', which cairis'the word Exposed or some other signal, to

indicate, whenvisible, that n exposure has 'beenmade.

The plate is secured 0 block 51: Bar" 1 f'whichvcarriesa pin or stud 1 2 which ex- 4o of parts to be hereinafter particularly pointtends upwardly through a hole in'the'topof thejcasmg 9 with a coiledspring 12 hearthe film or plate, the pin '12 will be lifted and the indicator plate 10 brought into view either, as'illust-rated, over the-top of the casing, or through a window opening the case. i

' When the plate 10 has thus been lifted it iscaughtbya latch 13 pivoted on a transverse pivot l4 in a groove in the top of the ustrate the de- 7 llO case with a coiled spring 15 on the pivot pin, one end bearing against the top and the other end 10 hooked around the latch tending to swing the latch laterally so that when the block 11 is raised the shoulder 17 in the latch will engage under the edge of the block to hold the indicator plate in the exposed position.

The lower-end of the latch which is curved at I3 to prevent catching projects over an extension 18, on the shutter lever 7 when the la'tch has engaged the block 11, so that the shutter levercan not be actuated when the latchis in vertical position and. no shotter operatiomcan take place until the latch is released and swung baclc to its normal position. To release the latch I pivot a releasing lever =19 inthebottom of the easing to swing horizontally, and one end of thislever engages ilna I'G CUSS 20 in the latch 13.1 The other endmfthis lever 19 extends oiitside of the'casing into the pathway. tiftiinarin projecting radially from a rotatable member- 23 which is mounted in a bracket 3O in the end. of a flexible shaft 24. This fienible shaft is coupled ton shaft 25, which carries agea'r 26in mesh :with the I 'geyir27'on-the film reel 3. The rotation of the ijeel 3 by the 'finger piece 4 will turn 'th flexible shaft-24 and the member 23 to liiillgi j.- e armez into contact'wit-h the le- In the rotation o f the flexible shaft, the member 23 may stop in any position and the actioniofftheffieiibleshaft may not always be of itself .to throw the lever 19 and 'th'er'efdretb increase the ellieiency and insure positive action I secure a spring rod this will stop the rotation and the tension in the flexible shaft will be increased nntilthe tension is sufliciently strong for thefn'rr'ri' 22 to snap past the retarding wire andjto strike the lever 19 with considerable force to insure positively the swinging of the arfn 19*and the releasing of the latch 13. The construction of releasing mechanism and. the means whereby I increase the tens'ijon of 'thejllexible shaft form two of the more important parts of my invention.

Hertoform'as inthe construction shown in the Fo'rd patent heretofore referred to, the holdi'ng latch is released directly by a ram member for'the application of which it is necessary to 'form a special opening in the shutter housing through which with any wear o'fth'e parts light is liable to enter behind the shutter and moreover a the'parts necssarilymust be small the cam member is not always accurate in its operation. This objection is obviated by the employment of as deduced from the the releasing lever 19. Again where reliance is placed on the torque of the flexible shalt alone to rotate the calm as in Ford, the a power exerted by the twisting shaft is liable not to be sullicient to ellect the release. The interposition of the spring piece 28 to increase the tension or to wind up, as it were, the flexible shaft insures positive and uniform action.

When the latch 13 has been released-the coiled spring 12 at once depresses the block 11 and the latch 13 is held out of the pathway of the shutter lever and the shutter is again free to operate.

.l t will be evident from the foregoing description that, when the sensitized film is brought into position for an exposure-and the shutter opened, this fact will be indicated by the indicator plate and that until the film reel is wound to expose a'new portion of the film, it will not be .possiblc to operate the shutter asecond time.

It is not. intended failingto mention equivalent structures for the details of construction to exclude the claims that follow from a broad andreasonableconstruction plain meaning 0f the words employed.

Having thus described my inventiomwhat I claim as new and'desire to secure by Letters Patent, is 1 5 I n 1. In a camera, the combination withthe case provided with means for holding and changing the sensitized material-and with shutter mechanism, of means for locking the shutter mechanism from repeated operation,

means for unlocking said locking means, and means intermediate the sensitized material holding and changing devices and the shutter locking device, whereby the actuation of the sensitized material changing .device will unlock the shutter mechanism with means for augmenting the tension o f said intermediate mechanism 'to insure uniform and effective unlocking.

2. In a camera, thecombination with the case provided with means for holding and changing the sensitized material 'and with shutter mechanism, of means for locking the shutter mechanism from repeated operation, means for unlocking said locking means and a flexible torsional shaft intermediate the unlocking means and the film holding and changing means. with means for increasing the tension of the'fiexible shaft to insure effective action.

3. In a shutter locking andindicating device for cameras, in combination with a film winding reel and a shutter housing with shutter mechanism therein, of a casing mounted thereon, a plate slidable in the 02s ing carrying a pin projecting into the pathway of the shutter mechanism, a latch for engaging said plate projecting into the pathway of the shutter operating device member and connection therefor with the film winding mechanism, and means for augmenting the tension of said reel connecting device to insure effective action.

4. In a shutter locking and indicating device for cameras, in combination with a film winding reel and a shutter housing with shutter mechanism therein, of a casing mounted thereon, a plate slidable in the casing carrying a pin projecting into the pathway of the shutter mechanism, a. latch for engaging said plate projecting into the pathway of the shutter operating device when the plate is engaged, and means for releasing said latch comprising a rotatable member, an arm on said member with a lever engaging said latch extending into the pathway of said arm, a spring rod on the casing also projecting into the pathway of said arm, and a flexible, torsional connection for the rotatable member with the film Winding mechanism for retarding the rotation of the rotating member to increase the tension thereof.

5. In a shutter locking and indicating device, the combination with the shutter mechanism and a housing for enclosing same, of a casin mounted in the shutter housing, a plate slidable in the casing carrying a pin projecting into the pathway of the shutter mechanism within the housing, a latch piv oted in the casing to engage the plate when lifted by the shutter mechanism, said latch when engaging the plate also projecting into the pathway of the shutter mechanism, a lever engaging said latch and projecting from the casing and a torsional spring operated rotatable member carrying an arm to engage said lever to release the latch, with a retarding member to increase the torsional tension for releasing the latch.

JAMES G. KALANZIS. 

